I had the same problem and fixed it by running "sudo apt-get install compiz".
Extra packages installed: compiz-gnome Suggested packages: gnome-themes NEW packages installed: compiz compiz-gnome -- Gnome Appearance Properties dialog hangs when changing desktop effects https://bugs.launchpad.net/bugs/554106 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
